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Caisson sinking construction method

A construction method and caisson technology, applied in caissons, infrastructure engineering, construction, etc., can solve problems such as safety accidents, unstable sinking, sudden sinking of caissons, etc., to ensure safety and quality, and fast construction progress , Reduce the effect of soil gushing and sand gushing

Inactive Publication Date: 2018-07-27
CCCC TDC ENVIRONMENTAL PROTECTION DREDGING
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

When sinking caissons near the river and sea areas, due to its special geographical location, the groundwater level is high and the soil is soft. When sinking caissons in this type of construction area, the soil around the caissons will produce quicksand and earth gushing, which is easy Sudden sinking of the caisson, resulting in unstable sinking and prone to safety accidents

Method used

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Embodiment Construction

[0061] Such as figure 1 Shown, a kind of caisson sinking construction method of the present invention comprises the steps:

[0062] (1) Foundation Pit Excavation

[0063] Such as figure 2 Shown is the schematic diagram of the structure of the foundation pit,

[0064] (1) In order to reduce the engineering quantity of caisson sinking, the foundation pit is excavated at the caisson fabrication site. The excavation depth of the foundation pit is determined according to the site soil quality and environmental conditions, so as to ensure that the caisson is 1m above the groundwater level during caisson fabrication. The size of the outer edge of the foundation pit is larger than that of the caisson to ensure that sufficient space for construction operations is reserved, such as the erection range of external scaffolding, some material storage yards and handling channels, crane and pump truck erection positions, etc.

[0065] (2) Drainage ditches and water collection wells are dug ...

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Abstract

The invention provides a caisson sinking construction method comprising the step (I) of excavation of a foundation pit: excavating the foundation pit at the manufacturing site of a caisson, digging drainage ditches at the edges of the foundation pit for collecting rainwater left in the foundation pit, and laying earth dams at the top edges of the slopes of the foundation pit for preventing rainwater on ground from flowing into the foundation pit; the step (II) of manufacturing and forming of the caisson; the step (III) of sinking of the caisson: a. primary sinking, b. normal sinking and c. final sinking; and the step (IV) of bottom sealing of the caisson. When the caisson sinking construction method is applied to caisson sinking near river or sea fields, sinking is steady and constructionis safe.

Description

technical field [0001] The invention relates to the technical field of hydropower facility construction, in particular to a caisson sinking construction method. Background technique [0002] Due to its stable structure and low cost, caissons have been widely used in municipal and industrial fields such as water supply, drainage, and electric power. When the caisson is sunk near the river and sea area, due to its special geographical location, the groundwater level is high and the soil is soft. When the caisson is sunk in this kind of construction area, the soil around the caisson will produce quicksand and earth gushing, which is easy Sudden sinking of caissons occurs, causing unsteady sinking and prone to safety accidents. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a caisson sinking construction method near rivers and seas with stable sinking and safe construction. [0004] A caisson sinking construction ...

Claims

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Application Information

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IPC IPC(8): E02D23/08
CPCE02D23/08
Inventor 贾延财刘杰章靳保林孙振远王建军徐鹏远
Owner CCCC TDC ENVIRONMENTAL PROTECTION DREDGING
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